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target-i386: Add support for UMIP and RDPID CPUID bits

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These are both stored in CPUID[EAX=7,EBX=0].ECX. KVM is going to
be able to emulate both (albeit with a performance loss in the case
of RDPID, which therefore will be in KVM_GET_EMULATED_CPUID rather
than KVM_GET_SUPPORTED_CPUID).

It's also possible to implement both in TCG, but this is for 2.8.

Backports commit c2f193b538032accb9db504998bf2ea7c0ef65af from qemu
This commit is contained in:
Paolo Bonzini 2018-02-25 20:46:32 -05:00 committed by Lioncash
parent 6714284211
commit 403021183d
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GPG key ID: 4E3C3CC1031BA9C7
2 changed files with 4 additions and 2 deletions
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4
qemu/target-i386/cpu.c
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@ -287,12 +287,12 @@ static const char *cpuid_7_0_ebx_feature_name[] = {
};
static const char *cpuid_7_0_ecx_feature_name[] = {
NULL, NULL, NULL, "pku",
NULL, NULL, "umip", "pku",
"ospke", NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, "rdpid", NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
};

2
qemu/target-i386/cpu.h
View file

@ -615,8 +615,10 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS];
#define CPUID_7_0_EBX_AVX512ER (1U << 27) /* AVX-512 Exponential and Reciprocal */
#define CPUID_7_0_EBX_AVX512CD (1U << 28) /* AVX-512 Conflict Detection */
#define CPUID_7_0_ECX_UMIP (1U << 2)
#define CPUID_7_0_ECX_PKU (1U << 3)
#define CPUID_7_0_ECX_OSPKE (1U << 4)
#define CPUID_7_0_ECX_RDPID (1U << 22)
#define CPUID_XSAVE_XSAVEOPT (1U << 0)
#define CPUID_XSAVE_XSAVEC (1U << 1)